Rename firstMessage command file to firstmessage and update imports

plugins/Commands/index.ts

@@ -8,7 +8,7 @@ import {
 import { pluginListCommand, themeListCommand } from "./src/commands/lists";
 import { petPetCommand } from "./src/commands/petpet";
 import { konoSelfCommand, konoSendCommand } from "./src/commands/konochan";
-import { firstMessageCommand } from "./src/commands/firstMessage";
+import { firstMessageCommand } from "./src/commands/firstmessage";
 import settings from "./settings";
 
 // Initialize storage with default values

plugins/Commands/settings.tsx

@@ -199,6 +199,7 @@ export default function Settings() {
               label="KonoChan Commands"
               subLabel="by btmc727 & Rico040"
             />
+            <TableRow label="FirstMessage Command" subLabel="by sapphire" />
           </TableRowGroup>
 
           {/* About */}